Help with simple regex

[h4x0rmx]

I have a simple regex that matches email addresses:

[\w.-]+@[\w.-]+\w+

It's not perfect and I don't need it to be more complex, this will do for the application I'm working on.
The string where I'm applying the regex to has a lot of email addresses and I want to block/skip email addresses from X domain (the domain will change from string to string)

This is what I was trying to do, but it doesn't always work:

[\w.-]+@([^craigslist][\w.-]+)\w+

Can somebody please help? I will really appreciate it!

[bradgrafelman]

Dump the regexps and go with [man]filter_var/man with the FILTER_VALIDATE_EMAIL flag.

EDIT: Woops, didn't read the part about the blacklisting domains.

I suppose you could just match the text after the '@' against an array of blacklisted domains (e.g. using [man]in_array/man). To that end, you could probalby do a simple [man]explode/man.